SocialiteProviders\Manager\Helpers\ConfigRetriever::retrieveItemsFromConfig PHP Method

    private function retrieveItemsFromConfig(array $keys, \Closure $keyRetrievalClosure)
    {
        $out = [];
        foreach ($keys as $key) {
            $out[$key] = $keyRetrievalClosure($key);
        }
        return $out;
    }